Expression data and meta data is downloaded from GEO. Samples are quantile normalized and visualized with PCA and tSNE.

#load libraries
library(GEOquery)
Registered S3 method overwritten by 'dplyr':
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  print.rowwise_df     
Setting options('download.file.method.GEOquery'='auto')
Setting options('GEOquery.inmemory.gpl'=FALSE)
library(preprocessCore)
library(ggplot2)
library(Rtsne)
library(plotly)
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library(ggthemes)
#downlaod data from GEO
gse <- getGEO('GSE50588')[[1]]
Found 1 file(s)
GSE50588_series_matrix.txt.gz
trying URL 'https://ftp.ncbi.nlm.nih.gov/geo/series/GSE50nnn/GSE50588/matrix/GSE50588_series_matrix.txt.gz'
Content type 'application/x-gzip' length 14767110 bytes (14.1 MB)
==================================================
downloaded 14.1 MB

Parsed with column specification:
cols(
  .default = col_double(),
  ID_REF = col_character()
)
See spec(...) for full column specifications.
File stored at: 
/var/folders/vr/g6hydgcs71s5t3jc2xvcp_cm0000gn/T//RtmppNsuQ6/GPL10558.soft
3270 parsing failures.
  row        col           expected    actual         file
29537 Unigene_ID 1/0/T/F/TRUE/FALSE Hs.571610 literal data
29538 Unigene_ID 1/0/T/F/TRUE/FALSE Hs.545780 literal data
29539 Unigene_ID 1/0/T/F/TRUE/FALSE Hs.554603 literal data
29540 Unigene_ID 1/0/T/F/TRUE/FALSE Hs.437179 literal data
29541 Unigene_ID 1/0/T/F/TRUE/FALSE Hs.128234 literal data
..... .......... .................. ......... ............
See problems(...) for more details.
#parse expression matrix
exp = gse@assayData$exprs
#quantile normalize expression matrix
norm_exp = normalize.quantiles(exp)
colnames(norm_exp) = colnames(exp)
rownames(norm_exp) = rownames(exp)
#parse metadata dataframe
meta = gse@phenoData@data
#compute PCs
pca_norm = prcomp(norm_exp)$rotation[,1:3]
#add relevant metadata to pca
pca_norm = cbind(pca_norm,data.frame(target_gene = meta[match(rownames(pca_norm),rownames(meta)),c("target gene:ch1")], stringsAsFactors = F))
ggplot(as.data.frame(pca_norm),aes(x = PC2, y = PC3, color = target_gene)) + geom_point()

#compute tsne
tsne_norm = Rtsne(t(norm_exp),dim = 3,perplexity = 6)$Y
colnames(tsne_norm) = c("tSNE1","tSNE2","tSNE3")
rownames(tsne_norm) = colnames(norm_exp)
#add relevant metadata to tsne
tsne_norm = cbind(tsne_norm,data.frame(target_gene = meta[match(rownames(tsne_norm),rownames(meta)),c("target gene:ch1")], stringsAsFactors = F))
ggplot(as.data.frame(tsne_norm),aes(x = tSNE1, y = tSNE2, color = target_gene)) + geom_point()

plot_ly(tsne_norm, x = ~tSNE1, y = ~tSNE2, z = ~tSNE3, color = ~target_gene)
No trace type specified:
  Based on info supplied, a 'scatter3d' trace seems appropriate.
  Read more about this trace type -> https://plot.ly/r/reference/#scatter3d
No scatter3d mode specifed:
  Setting the mode to markers
  Read more about this attribute -> https://plot.ly/r/reference/#scatter-mode
n too large, allowed maximum for palette Set2 is 8
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  Based on info supplied, a 'scatter3d' trace seems appropriate.
  Read more about this trace type -> https://plot.ly/r/reference/#scatter3d
No scatter3d mode specifed:
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  Read more about this attribute -> https://plot.ly/r/reference/#scatter-mode
n too large, allowed maximum for palette Set2 is 8
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Z-score samples and visualize

znorm_exp = t(scale(t(norm_exp), center = T, scale = T))
#compute tsne
tsne_znorm = Rtsne(t(znorm_exp),dim = 3,perplexity = 3,theta = 0.001)$Y
colnames(tsne_znorm) = c("tSNE1","tSNE2","tSNE3")
rownames(tsne_znorm) = colnames(znorm_exp)
#add relevant metadata to tsne
tsne_znorm = cbind(tsne_znorm,data.frame(target_gene = meta[match(rownames(tsne_znorm),rownames(meta)),c("target gene:ch1")], stringsAsFactors = F))
ggplot(as.data.frame(tsne_znorm),aes(x = tSNE1, y = tSNE2, color = target_gene)) + geom_point() + theme_few() 

plot_ly(tsne_znorm, x = ~tSNE1, y = ~tSNE2, z = ~tSNE3, color = ~target_gene)
No trace type specified:
  Based on info supplied, a 'scatter3d' trace seems appropriate.
  Read more about this trace type -> https://plot.ly/r/reference/#scatter3d
No scatter3d mode specifed:
  Setting the mode to markers
  Read more about this attribute -> https://plot.ly/r/reference/#scatter-mode
n too large, allowed maximum for palette Set2 is 8
Returning the palette you asked for with that many colors
n too large, allowed maximum for palette Set2 is 8
Returning the palette you asked for with that many colors
No trace type specified:
  Based on info supplied, a 'scatter3d' trace seems appropriate.
  Read more about this trace type -> https://plot.ly/r/reference/#scatter3d
No scatter3d mode specifed:
  Setting the mode to markers
  Read more about this attribute -> https://plot.ly/r/reference/#scatter-mode
n too large, allowed maximum for palette Set2 is 8
Returning the palette you asked for with that many colors
n too large, allowed maximum for palette Set2 is 8
Returning the palette you asked for with that many colors

Generate Signatures

library(GeoDE)
Loading required package: Matrix
Loading required package: MASS

Attaching package: ‘MASS’

The following object is masked from ‘package:plotly’:

    select
library(matrixStats)

Attaching package: ‘matrixStats’

The following objects are masked from ‘package:Biobase’:

    anyMissing, rowMedians
library(limma)
#map Illumina probes to gene ids
library(illuminaHumanv4.db)
Loading required package: AnnotationDbi
Loading required package: stats4
Loading required package: IRanges
Loading required package: S4Vectors

Attaching package: ‘S4Vectors’

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Attaching package: ‘AnnotationDbi’

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Loading required package: org.Hs.eg.db
gene_names = data.frame(Gene=unlist(mget(x = rownames(norm_exp),envir = illuminaHumanv4SYMBOL)))
#remove probes without mapped genes
norm_exp_df=as.data.frame(norm_exp)
norm_exp_df$gene_names = as.character(gene_names[,1])
norm_exp_df = norm_exp_df[!is.na(norm_exp_df$gene_names),]
rm(gene_names,norm_exp)
#where probes map to same genes, chose probes with greater variance
norm_exp_df = norm_exp_df[order(rowVars(as.matrix(norm_exp_df[,setdiff(colnames(norm_exp_df),"gene_names")])), decreasing = T),]
norm_exp_df = norm_exp_df[!duplicated(norm_exp_df$gene_names),]
# norm_exp_df = plyr::ddply(norm_exp_df,plyr::.(gene_names),function(exp_sub){
#   if(nrow(exp_sub)>1){
#     exp_sub_mat = exp_sub
#     exp_sub_mat$gene_names = NULL
#     exp_sub_mat = as.matrix(exp_sub_mat)
#     return(exp_sub[which.max(rowVars(exp_sub_mat)),])
#   }else{
#     return(exp_sub)
#   }
# })
rownames(norm_exp_df) = norm_exp_df$gene_names
norm_exp_df$gene_names = NULL
##write metadata and normalized expression to file
write.table(meta,"/Volumes/My Passport/ChromNet/Cusanovich/meta.tsv",row.names = T, col.names = T, sep = "\t", quote = T)
write.table(norm_exp_df, "/Volumes/My Passport/ChromNet/Cusanovich/norm_exp.tsv", row.names = T, col.names = T, sep = "\t", quote = F)
#pull out control expression
ctl_accessions = meta[meta$`target gene:ch1`=="NS",]$geo_accession
norm_ctl_exp = norm_exp_df[,colnames(norm_exp_df) %in% ctl_accessions]
ctl_class = rep(1,ncol(norm_ctl_exp))
#generate chardir signature for each TF knockdown
chardir_sigs = plyr::dlply(meta[meta$`target gene:ch1`!="NS",],
  plyr::.(`target gene:ch1`), function(tf){
    pert_accessions = tf$geo_accession
    norm_pert_exp = norm_exp_df[,colnames(norm_exp_df) %in% pert_accessions]
    pert_class = rep(2,ncol(norm_pert_exp))
    norm_instance_exp = cbind(norm_ctl_exp,norm_pert_exp)
    norm_instance_exp = cbind(data.frame(genenames = rownames(norm_instance_exp)),
      norm_instance_exp)
    instance_class = as.factor(c(ctl_class,pert_class))
    return(chdirAnalysis(norm_instance_exp,
      instance_class,
      list(1),
      CalculateSig = F)$results[[1]])
  
})

limma_sigs =  plyr::dlply(meta[meta$`target gene:ch1`!="NS",],
  plyr::.(`target gene:ch1`), function(tf){
    pert_accessions = tf$geo_accession
    norm_pert_exp = norm_exp_df[,colnames(norm_exp_df) %in% pert_accessions]
    pert_class = rep("pert",ncol(norm_pert_exp))
    norm_instance_exp = cbind(norm_ctl_exp,norm_pert_exp)
    design = data.frame(Control = c(rep(1,ncol(norm_ctl_exp)),rep(0,ncol(norm_pert_exp))), 
       Perturbation = c(rep(0, ncol(norm_ctl_exp)), rep(1, ncol(norm_pert_exp)))) 
     rownames(design) = colnames(norm_instance_exp) 
     fit = lmFit(norm_instance_exp, design=design) 
     cont.matrix = makeContrasts(PerturbationvsControl=Perturbation-Control, levels=design) 
     fit2 <- contrasts.fit(fit, cont.matrix) 
     fit = eBayes(fit2)
     return(topTable(fit, n = Inf))
})
limma_FC = plyr::ldply(limma_sigs,function(sig){
  df = data.frame(t(sig$logFC))
  colnames(df) = rownames(sig)
  return(df)
  
})
rownames(limma_FC) = limma_FC$`target gene:ch1`
limma_FC$`target gene:ch1` = NULL
limma_FC = as.data.frame(t(limma_FC))
limma_adj_pvals = plyr::ldply(limma_sigs,function(sig){
  df = data.frame(t(sig$P.Value))
  colnames(df) = rownames(sig)
  return(df)
})
rownames(limma_adj_pvals) = limma_adj_pvals$`target gene:ch1`
limma_adj_pvals$`target gene:ch1` = NULL
limma_adj_pvals = as.data.frame(t(limma_adj_pvals))
#write limma signature matrices to file
write.table(limma_FC,"/volumes/My Passport/ChromNet/Cusanovich/limma_sigs_FC.tsv", sep = "\t", quote = F, col.names = T, row.names = T)
write.table(limma_adj_pvals,"/volumes/My Passport/ChromNet/Cusanovich/limma_sigs_adj_pval.tsv", sep = "\t", quote = F, col.names = T, row.names = T)

Generate a signature matrix from the signature list

write.table(chardir_sigs_mat,"/Volumes/My Passport/Cusanovich/chardir_sigs_mat.tsv",sep = "\t", quote = F, row.names = T, col.names = T)
cannot open file '/Volumes/My Passport/Cusanovich/chardir_sigs_mat.tsv': No such file or directoryError in file(file, ifelse(append, "a", "w")) : 
  cannot open the connection
---
title: "Cusanovich et. al Signatures"
output: html_notebook
---

Expression data and meta data is downloaded from GEO. Samples are quantile normalized and visualized with PCA and tSNE.

```{r}
#load libraries
library(GEOquery)
library(preprocessCore)
library(ggplot2)
library(Rtsne)
library(plotly)
library(ggthemes)

#downlaod data from GEO
gse <- getGEO('GSE50588')[[1]]

#parse expression matrix
exp = gse@assayData$exprs

#quantile normalize expression matrix
norm_exp = normalize.quantiles(exp)
colnames(norm_exp) = colnames(exp)
rownames(norm_exp) = rownames(exp)

#parse metadata dataframe
meta = gse@phenoData@data

#compute PCs
pca_norm = prcomp(norm_exp)$rotation[,1:3]

#add relevant metadata to pca
pca_norm = cbind(pca_norm,data.frame(target_gene = meta[match(rownames(pca_norm),rownames(meta)),c("target gene:ch1")], stringsAsFactors = F))


ggplot(as.data.frame(pca_norm),aes(x = PC2, y = PC3, color = target_gene)) + geom_point()

#compute tsne
tsne_norm = Rtsne(t(norm_exp),dim = 3,perplexity = 6)$Y
colnames(tsne_norm) = c("tSNE1","tSNE2","tSNE3")
rownames(tsne_norm) = colnames(norm_exp)

#add relevant metadata to tsne
tsne_norm = cbind(tsne_norm,data.frame(target_gene = meta[match(rownames(tsne_norm),rownames(meta)),c("target gene:ch1")], stringsAsFactors = F))

ggplot(as.data.frame(tsne_norm),aes(x = tSNE1, y = tSNE2, color = target_gene)) + geom_point()
plot_ly(tsne_norm, x = ~tSNE1, y = ~tSNE2, z = ~tSNE3, color = ~target_gene)
```

Z-score samples and visualize 
```{r}
znorm_exp = t(scale(t(norm_exp), center = T, scale = T))

#compute tsne
tsne_znorm = Rtsne(t(znorm_exp),dim = 3,perplexity = 3,theta = 0.001)$Y
colnames(tsne_znorm) = c("tSNE1","tSNE2","tSNE3")
rownames(tsne_znorm) = colnames(znorm_exp)

#add relevant metadata to tsne
tsne_znorm = cbind(tsne_znorm,data.frame(target_gene = meta[match(rownames(tsne_znorm),rownames(meta)),c("target gene:ch1")], stringsAsFactors = F))

ggplot(as.data.frame(tsne_znorm),aes(x = tSNE1, y = tSNE2, color = target_gene)) + geom_point() + theme_few() 
plot_ly(tsne_znorm, x = ~tSNE1, y = ~tSNE2, z = ~tSNE3, color = ~target_gene)

```

Generate Signatures
```{r}
library(GeoDE)
library(matrixStats)
library(limma)
#map Illumina probes to gene ids
library(illuminaHumanv4.db)
gene_names = data.frame(Gene=unlist(mget(x = rownames(norm_exp),envir = illuminaHumanv4SYMBOL)))

#remove probes without mapped genes
norm_exp_df=as.data.frame(norm_exp)
norm_exp_df$gene_names = as.character(gene_names[,1])
norm_exp_df = norm_exp_df[!is.na(norm_exp_df$gene_names),]
rm(gene_names,norm_exp)
#where probes map to same genes, chose probes with greater variance
norm_exp_df = norm_exp_df[order(rowVars(as.matrix(norm_exp_df[,setdiff(colnames(norm_exp_df),"gene_names")])), decreasing = T),]
norm_exp_df = norm_exp_df[!duplicated(norm_exp_df$gene_names),]


# norm_exp_df = plyr::ddply(norm_exp_df,plyr::.(gene_names),function(exp_sub){
#   if(nrow(exp_sub)>1){
#     exp_sub_mat = exp_sub
#     exp_sub_mat$gene_names = NULL
#     exp_sub_mat = as.matrix(exp_sub_mat)
#     return(exp_sub[which.max(rowVars(exp_sub_mat)),])
#   }else{
#     return(exp_sub)
#   }
# })

rownames(norm_exp_df) = norm_exp_df$gene_names
norm_exp_df$gene_names = NULL

##write metadata and normalized expression to file
write.table(meta,"/Volumes/My Passport/ChromNet/Cusanovich/meta.tsv",row.names = T, col.names = T, sep = "\t", quote = T)
write.table(norm_exp_df, "/Volumes/My Passport/ChromNet/Cusanovich/norm_exp.tsv", row.names = T, col.names = T, sep = "\t", quote = F)

#pull out control expression
ctl_accessions = meta[meta$`target gene:ch1`=="NS",]$geo_accession
norm_ctl_exp = norm_exp_df[,colnames(norm_exp_df) %in% ctl_accessions]
ctl_class = rep(1,ncol(norm_ctl_exp))

#generate chardir signature for each TF knockdown
chardir_sigs = plyr::dlply(meta[meta$`target gene:ch1`!="NS",],
  plyr::.(`target gene:ch1`), function(tf){
    pert_accessions = tf$geo_accession
    norm_pert_exp = norm_exp_df[,colnames(norm_exp_df) %in% pert_accessions]
    pert_class = rep(2,ncol(norm_pert_exp))
    norm_instance_exp = cbind(norm_ctl_exp,norm_pert_exp)
    norm_instance_exp = cbind(data.frame(genenames = rownames(norm_instance_exp)),
      norm_instance_exp)
    instance_class = as.factor(c(ctl_class,pert_class))
    return(chdirAnalysis(norm_instance_exp,
      instance_class,
      list(1),
      CalculateSig = F)$results[[1]])
  
})

limma_sigs =  plyr::dlply(meta[meta$`target gene:ch1`!="NS",],
  plyr::.(`target gene:ch1`), function(tf){
    pert_accessions = tf$geo_accession
    norm_pert_exp = norm_exp_df[,colnames(norm_exp_df) %in% pert_accessions]
    pert_class = rep("pert",ncol(norm_pert_exp))
    norm_instance_exp = cbind(norm_ctl_exp,norm_pert_exp)
    design = data.frame(Control = c(rep(1,ncol(norm_ctl_exp)),rep(0,ncol(norm_pert_exp))), 
       Perturbation = c(rep(0, ncol(norm_ctl_exp)), rep(1, ncol(norm_pert_exp)))) 
     rownames(design) = colnames(norm_instance_exp) 
     fit = lmFit(norm_instance_exp, design=design) 
     cont.matrix = makeContrasts(PerturbationvsControl=Perturbation-Control, levels=design) 
     fit2 <- contrasts.fit(fit, cont.matrix) 
     fit = eBayes(fit2)
     return(topTable(fit, n = Inf))
})

limma_FC = plyr::ldply(limma_sigs,function(sig){
  df = data.frame(t(sig$logFC))
  colnames(df) = rownames(sig)
  return(df)
  
})

rownames(limma_FC) = limma_FC$`target gene:ch1`
limma_FC$`target gene:ch1` = NULL
limma_FC = as.data.frame(t(limma_FC))

limma_adj_pvals = plyr::ldply(limma_sigs,function(sig){
  df = data.frame(t(sig$P.Value))
  colnames(df) = rownames(sig)
  return(df)
})

rownames(limma_adj_pvals) = limma_adj_pvals$`target gene:ch1`
limma_adj_pvals$`target gene:ch1` = NULL
limma_adj_pvals = as.data.frame(t(limma_adj_pvals))

#write limma signature matrices to file
write.table(limma_FC,"/volumes/My Passport/ChromNet/Cusanovich/limma_sigs_FC.tsv", sep = "\t", quote = F, col.names = T, row.names = T)

write.table(limma_adj_pvals,"/volumes/My Passport/ChromNet/Cusanovich/limma_sigs_adj_pval.tsv", sep = "\t", quote = F, col.names = T, row.names = T)


```


Generate a signature matrix from the signature list
```{r}

ordered_chardir_sigs = lapply(chardir_sigs,function(sig){
  return(sig[order(names(sig))])
})
chardir_sigs_mat = do.call("rbind",ordered_chardir_sigs)

write.table(chardir_sigs_mat,"/Volumes/My Passport/ChromNet/Cusanovich/chardir_sigs_mat.tsv",sep = "\t", quote = F, row.names = T, col.names = T)

```

